10-40=-30

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Solution for 10-40=-30 equation: 


Simplifying
10 + -40 = -30

Combine like terms: 10 + -40 = -30
-30 = -30

Add '30' to each side of the equation.
-30 + 30 = -30 + 30

Combine like terms: -30 + 30 = 0
0 = -30 + 30

Combine like terms: -30 + 30 = 0
0 = 0

Solving
0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.

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